A couple of weeks ago, I finally got round to having my Covid booster. Then last week I my flu jab. (I’m in the NHS and we are encouraged to.) I developed knee pain on climbing stairs last week, first in one knee, now in both. Today, I’m really struggling to climb stairs as each step is agony and now my hips also hurt. I’ve read the Moderna vaccine can rarely cause Arthritis. Does my sudden joint pain sound like it might be related? Or can anyone else think of why this might have started when I haven’t done anything to cause it? It’s weird to be suddenly debilitated. Thanks